NATARAJAThe stowage plan
Learning outcomes & permitted supports
- Solve full and down: the one mix of heavy and light cargo that uses every tonne AND every cubic metre
- Read the ship's cubic ratio and predict which limit a single cargo hits first
- Plan parcels across holds so every port discharges in order — and catch overstows on paper
- Inflate space for broken stowage honestly
- Say what the full plan still owes the ship: trim, stress, a moderate GM, segregation
Supports in this lab: Calculator. Full-and-down as a live two-line chart; discharge-order board with overstow detection. Golden 840/840.
Full and down — the planner's bullseye
A ship earns nothing on empty cubic and nothing on unused deadweight. With one heavy cargo and one light one, there is exactly ONE mix that fills the space and sinks her to her marks at the same time — where the two lines cross.
| Ship's cubic ratio | 1.300 m³/t — cargoes below this run out of WEIGHT, above it run out of SPACE |
|---|---|
| Heavy cargo | 9231 t → 5538 m³ |
| Light cargo | 10769 t → 20462 m³ |
| Check | 20000 t of 20000 t · 26000 m³ of 26000 m³ — both books close |
The discharge order is the plan
Ports discharge A → B → C. Paint each hold's lower hold and tween deck with a parcel. The iron law: first port out sits on top. The board calls every overstow.
What the full plan still owes the ship
Full and down settles HOW MUCH; the plan must still settle WHERE — weight spread along the length for trim and stress (ST-02's loading table is this), heavy low but not so low she goes stiff (ST-06's rolling test tells you), segregation kept (CW-02), and every parcel reachable in port order (the board above). One document answers the mate's four questions at once. Tankers, grain and timber bring their own chapters — next on the bench.